Abstract:
The disclosure relates to a machine for making a plastic covering on a rigid base article which in the illustrated form comprises a glass bottle and a conforming shrunken plastic covering thereon. The plastic is fed in oriented sheet form to the turret apparatus, cut into lengths and wrapped and seamed on successive mandrels as sleeves. Bottles are simultaneously processed to preheat condition and indexed over the sleeves, the latter telescopically assembled on the rigid base article, i.e. the bottle, and the combination carried to a heat tunnel. The plastic sleeve shrinks into snug surface fit on the adjacent surface portion of the rigid base article. The bottle is preheated in one of two embodiments by: (1) a preheat tunnel on the machine which raises the bottles from room temperature to about 220*F, or (2) the preheat is carried over as latent heat in the glass bottle from the annealing lehr, a part of the bottle manufacturing process. The machine includes novel subassemblies comprised of (1) a bottle chuck and loading station for assuring proper loading of the bottles on the machine, (2) bottle handling, (3) plastic strip handling and feed mechanism for placing oriented cut lengths onto mandrels of the turret, (4) the turret for making seamed sleeves in succession and feeding them onto registered bottles carried by the bottle handling apparatus, and (5) unloading device for transfer of the covered bottles to a conveyor and with said transfer smoothening the bottom surface of the covering on the bottle.
Abstract:
The disclosure relates to a machine for making a plastic covering on a rigid base article which in the illustrated form comprises a glass bottle and a conforming shrunken plastic covering thereon. The machine includes novel subassemblies comprised of a bottle chuck and loading station for assuring proper loading of the bottles on the machine, bottle handling, and unloading device for transfer of the covered bottles to a conveyor and with said transfer smoothening the bottom surface of the covering on the bottle.
Abstract:
MOLDED PULP PLATE HAVING CONTINUOUS AND UNSEAMED LINER OF POLYPROPYLENE FILM BONDE%D TO ITS INTERIOR SURFACES BY POLYETHYLENE. UNDERSIDE OF POLYPROPYLENE FILM MAY BE PRINTED WITH DECORATIVE DESIGN. METHOD INCLUDES CLAMPING A SHEET OF POLYPROPYLENE FILM, HAVING POLYETHYLENE COATING ON ITS UNDERSIDE SURFACE, AGAINST THE MOUTH RIM OF THE PLATE; HEATING THE PLATE AND FILM TO A TEMPERATURE WHICH IS ABOVE THE SOFTENING POINT TEMPERATURE OF THE POLYETHYLENE MATERIAL BUT BELOW THE SOFTENING POINT TEMPERATURE OF POLYPROPYLENE; AND DRAWING A VACUUM THROUGH THE BOTTOM OF THE PLATE TO PRESS THE FILM AGAINST THE INTERIOR OF THE PLATE.